[Zac]

Putting syn into an older car will not hurt it although everyone and their Mom claims it will. Some companies reccomend a cleaner oil and even that is debated if it is really needed. Mobil 1 is the best brand you will get at the Walmart. I run Amsoil which is readily available around here for a bit less than 5 bucks a quart and I have been very happy with the results.

 

[Zac]

It is hard to get
I would run it over Amsoil but I have simply not been able to find it unless you buy in serious bulk...

 

[Zac]

Dino oil sucks for the main reason that I do not always have the time to change my oil every 3-4 weeks, or will the weather permit me to. I have run about 10,000 mile runs on Amsoil 5w-30 and filters and in the last two runs, I have not lost a single drop of oil.